Precise window estimation based on your last period and cycle length. Optimized for clarity.
Our tool uses the Naegele's rule to estimate your due date, which is roughly 40 weeks (280 days) from your last period. Ovulation is typically 14 days before your next period begins.
Note: This tool is strictly for educational purposes and assumes a perfectly regular cycle. Individual cycle lengths vary. This estimation does not serve as a guaranteed contraceptive strategy nor a medical diagnostic tool. Always consult a physician.
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